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[v4,00/17] riscv: Add Sipeed Maix support

Message ID 20200211060425.1619471-1-seanga2@gmail.com
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Series riscv: Add Sipeed Maix support | expand

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Sean Anderson Feb. 11, 2020, 6:04 a.m. UTC
This patch series adds support for Sipeed Maix boards and the Kendryte
K210 CPU. Currently, only the Maix Bit V2.0 is supported, however other
models are similar. This series depends on
<https://patchwork.ozlabs.org/patch/1215327/>
(clk: Include missing headers for linux/clk-provider.h).
In addition, there are optional dependencies on
<https://patchwork.ozlabs.org/project/uboot/list/?series=156377>
<https://patchwork.ozlabs.org/project/uboot/list/?series=156381> and
<https://patchwork.ozlabs.org/patch/1232422/>
(wdt: Add DM support for Designware WDT)
(riscv: Try to get cpu frequency from device tree)
(serial: Set baudrate on boot)

To flash u-boot to a maix bit, run
kflash -tp /dev/<your tty here> -B bit_mic u-boot-dtb.bin

Boot output should look like the following:

U-Boot 2020.01-00465-g1da52c6c9a (Feb 10 2020 - 20:26:50 -0500)

DRAM:  8 MiB
MMC:
In:    serial@38000000
Out:   serial@38000000
Err:   serial@38000000
=>

The MMC (SD-card reader) does not work yet (see the second spi patch for
details). I'm not sure how to set up autoboot.  Should I arbitrarily assign
partitions? Should I use MTD/UBI?

Changes for v4:
- Linted several patches
- Updated the copyright year for several files
- Added tests for syscon-reset, simple-pm-bus, and the pll calc_rate function
- Added/updated documentation
- Fixed SPI for the nor flash
- Fixed PLLs not enabling/setting rate properly
- RISCV_PRIV_1_9_1 now (un)defines all deferring CSRs, and also disables VM
- More devicetree changes

Changes for v3:
- Remove patch to set RV64I as default
- Remove patch for a separate sysctl driver
- Split off cpu frequency patch into its own series
- Reorder support/devicetree patches to come last
- Add patch for reset driver
- Add simple-pm-bus for busses with their own clocks
- Add additional documentation
- Reword mcounteren patch to refer to the RISC-V priv spec 1.9.1
- Many devicetree changes
- Switch to "make savedefconfig" to generate the config

Changes for v2:
- Many bugfixes for the device tree
- Modify the config to build without errors
- Add support for keeping internal PLL frequencies in-range
- Fix several rebase-induced artifacts

Sean Anderson (17):
  clk: Always use the supplied struct clk
  clk: Check that ops of composite clock components exist before calling
  clk: Unconditionally recursively en-/dis-able clocks
  reset: Add generic reset driver
  dm: Add support for simple-pm-bus
  spi: dw: Add device tree properties for fields in CTRL1
  spi: dw: Add mem_ops
  riscv: Add headers for asm/global_data.h
  riscv: Add option to support RISC-V privileged spec 1.9.1
  riscv: Allow use of reset drivers
  riscv: Add K210 pll support
  riscv: Add a bypass clock for K210
  riscv: Add K210 clock support
  riscv: Try to get cpu frequency from device tree
  riscv: Enable cpu clock if it is present
  riscv: Add device tree for K210
  riscv: Add Sipeed Maix support

 MAINTAINERS                                   |   6 +
 arch/riscv/Kconfig                            |  14 +
 arch/riscv/cpu/cpu.c                          |   9 +
 arch/riscv/dts/Makefile                       |   1 +
 arch/riscv/dts/k210-maix-bit.dts              |  41 ++
 arch/riscv/dts/k210.dtsi                      | 568 ++++++++++++++++
 arch/riscv/include/asm/csr.h                  |  40 ++
 arch/riscv/include/asm/global_data.h          |   2 +
 arch/riscv/lib/reset.c                        |   2 +
 arch/sandbox/dts/test.dts                     |  21 +
 arch/sandbox/include/asm/clk.h                |   1 +
 board/sipeed/maix/Kconfig                     |  56 ++
 board/sipeed/maix/MAINTAINERS                 |  11 +
 board/sipeed/maix/Makefile                    |   5 +
 board/sipeed/maix/maix.c                      |   9 +
 configs/sandbox_defconfig                     |   2 +
 configs/sipeed_maix_bitm_defconfig            |  10 +
 doc/board/index.rst                           |   1 +
 doc/board/sipeed/index.rst                    |   9 +
 doc/board/sipeed/maix.rst                     |  94 +++
 .../bus/simple-pm-bus.txt                     |  44 ++
 .../reset/syscon-reset.txt                    |  36 ++
 .../spi/snps,dw-apb-ssi.txt                   |  43 ++
 doc/imx/clk/ccf.txt                           |  63 +-
 drivers/clk/Kconfig                           |   1 +
 drivers/clk/Makefile                          |   1 +
 drivers/clk/clk-composite.c                   |  64 +-
 drivers/clk/clk-divider.c                     |   6 +-
 drivers/clk/clk-fixed-factor.c                |   3 +-
 drivers/clk/clk-gate.c                        |   6 +-
 drivers/clk/clk-mux.c                         |  12 +-
 drivers/clk/clk-uclass.c                      |  59 +-
 drivers/clk/imx/clk-gate2.c                   |   4 +-
 drivers/clk/kendryte/Kconfig                  |  12 +
 drivers/clk/kendryte/Makefile                 |   1 +
 drivers/clk/kendryte/bypass.c                 | 268 ++++++++
 drivers/clk/kendryte/clk.c                    | 409 ++++++++++++
 drivers/clk/kendryte/pll.c                    | 604 ++++++++++++++++++
 drivers/core/Kconfig                          |   7 +
 drivers/core/Makefile                         |   1 +
 drivers/core/simple-pm-bus.c                  |  55 ++
 drivers/cpu/riscv_cpu.c                       |  38 +-
 drivers/reset/Kconfig                         |   5 +
 drivers/reset/Makefile                        |   1 +
 drivers/reset/reset-syscon.c                  |  79 +++
 drivers/spi/designware_spi.c                  | 163 ++++-
 include/configs/sipeed-maix.h                 |  17 +
 include/dt-bindings/clock/k210-sysctl.h       |  53 ++
 include/dt-bindings/mfd/k210-sysctl.h         |  38 ++
 include/dt-bindings/reset/k210-sysctl.h       |  38 ++
 include/kendryte/bypass.h                     |  28 +
 include/kendryte/clk.h                        |  27 +
 include/kendryte/pll.h                        |  57 ++
 include/test/export.h                         |  16 +
 test/dm/Makefile                              |   3 +
 test/dm/k210_pll.c                            |  95 +++
 test/dm/simple-pm-bus.c                       |  44 ++
 test/dm/syscon-reset.c                        |  58 ++
 58 files changed, 3235 insertions(+), 126 deletions(-)
 create mode 100644 arch/riscv/dts/k210-maix-bit.dts
 create mode 100644 arch/riscv/dts/k210.dtsi
 create mode 100644 board/sipeed/maix/Kconfig
 create mode 100644 board/sipeed/maix/MAINTAINERS
 create mode 100644 board/sipeed/maix/Makefile
 create mode 100644 board/sipeed/maix/maix.c
 create mode 100644 configs/sipeed_maix_bitm_defconfig
 create mode 100644 doc/board/sipeed/index.rst
 create mode 100644 doc/board/sipeed/maix.rst
 create mode 100644 doc/device-tree-bindings/bus/simple-pm-bus.txt
 create mode 100644 doc/device-tree-bindings/reset/syscon-reset.txt
 create mode 100644 doc/device-tree-bindings/spi/snps,dw-apb-ssi.txt
 create mode 100644 drivers/clk/kendryte/Kconfig
 create mode 100644 drivers/clk/kendryte/Makefile
 create mode 100644 drivers/clk/kendryte/bypass.c
 create mode 100644 drivers/clk/kendryte/clk.c
 create mode 100644 drivers/clk/kendryte/pll.c
 create mode 100644 drivers/core/simple-pm-bus.c
 create mode 100644 drivers/reset/reset-syscon.c
 create mode 100644 include/configs/sipeed-maix.h
 create mode 100644 include/dt-bindings/clock/k210-sysctl.h
 create mode 100644 include/dt-bindings/mfd/k210-sysctl.h
 create mode 100644 include/dt-bindings/reset/k210-sysctl.h
 create mode 100644 include/kendryte/bypass.h
 create mode 100644 include/kendryte/clk.h
 create mode 100644 include/kendryte/pll.h
 create mode 100644 include/test/export.h
 create mode 100644 test/dm/k210_pll.c
 create mode 100644 test/dm/simple-pm-bus.c
 create mode 100644 test/dm/syscon-reset.c